KENNEDY ASSASSINATION RECORDS ACT OF 1992 |

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104-10179-10167 | 2025 RELEASE UNDER THE PRESIDENT JOHN F.

CJ RETURNTOCIA . ° 6 Y

B, ckground Use Only
Do Not Reproduce / ,

TSG/CAP MOMO £646
3 January 1963 :

MEMORANDUM FOR 3; Chief, Special Affairs Staff
ATTENTION 3 Mr, A. Rodriquez

SUBJECT 3 Radio Switch Equipment for Demolition
Firing Purposes

0 1, After our conversation on this subject on 30 December,
the question was discussed with Mr. fay Alpern,)TSD/AOB, and
Ms (Lee Poole,)TSD/QRF. The following information i¢ forwarded
for your consideration ag a result of our discussions,

7

°
a 9 " Mr, ‘Mipeem) Audio Operations Branchs- recommends two
companies as sources of equipment of this nature, These companies
have experience, under classified contracts with TSD, in producing
reliable equipment for special purposes of this sort. They also,
of course turn out commercial equipment of good quality for normal

communications needs, These Sompanics are:
_ 29,0

a.\Motorola, Chicago, Illinois »)
\ 29,08

bi Kell, Cambridge, Massachusetts

1 ra . -
The TSD VHF radio switth edifpmdnt for demolition needs was
developed for us by(Mctorola, 'Kell-Com! }ransistorized sets have
been produced to me6t the special needs (nét for demolition purposes)

: of other SAS projects,

3. In the opinion of both persons conaulted, the expenses noted
in our first discussion should have produced a reasonable amount of

workable equipment if the source was both capable and reliable. ~
_JSD recommends the use of frequencies in the VHF/MHF spectrum for
equipment of this sort and crystal tuning control for reasons of reliabifty,

selectivity and rejection of spurious signals.

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. 4. Inexpensive equipment of Japanese or American manufacture
in the citizen’ band frequency ranges for toys, radio control devices, - el

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Page Two

short range communications, etc., is available from many
manufacturers. Our Quick Reaction Facility can produce a

emall number of radio switches based on these devicts witha
considerably lesser degree of security from false signal triggering
with a lead time of 6 to & Weeks, Simple mechanical protection
against accidental triggering can be gained by inclusion of counting
switches, for example, which require a preset number of firing
impulses intentionally transmitted to produce the final closure of

a relay and firing of a charge.

5. Reliability of operation in terms of response toa
transmitted signal of a given power is quite difficult to predict when
conditions of antenna length, orientation and exposure cannot be
foreseen. Location of the receiver.in a target building will also have
a strong bearing on ‘range' from the transmitter, Building construction,
intervening obstacles and interference from other nearby radio fre~
quency sources will affect performance of the set.

6 you wish to discuss the pro*'ema in greater depth,

we recommend a conference with audio ‘echnicians or engineerr,

It may serve to clarify the appropriate haracteristice which special or m
modified commercial equipment shoule pogsesa to meet the needs of your
operation, Putblems of camouflaging the explosive or incendiary material
to serve operational requiretnents would be minor compared to the
necessary consideration of effects on the receiver switch concealed
within which could have important effects an performance, :

C/TSD/CAB/SD
. 03
Distribution:
2-C/SAS

een pecan erent nee

